Decoding device and encryption device as well as pseudo-random number generator program pseudo-random number generator, and a pseudo-random number generation method

摘要

PROBLEM TO BE SOLVED: To provide a pseudo random number generation device capable of outputting the random number sequence of a long cycle by a relatively small device scale.;SOLUTION: The pseudo random number generation device comprises: a pseudo random number generator 11 for generating a primary random number R1; a register 12 comprising storage elements for the same number as the number of kinds of the random number patterns of a secondary random number R2, where the different random number patterns are stored in the respective storage elements; and a control part 13 for agitating the register 12 with the two or more storage elements specified by selected first address and second address as objects and outputting a numerical value stored in the storage element specified by a selected third address as the secondary random number. At least one of the first address, the second address and the third address is supplied as the primary random number R1 or an operational value based on the primary random number R1.;COPYRIGHT: (C)2008,JPO&INPIT